The structural properties of polymer brushes, formed by dendron polymers up to the third generation, were studied by means of Brownian dynamics simulations for the macroscopic state of good solvent. The distributions of polymer units, of the free-ends, of the dendrons centers of mass and of the units of every dendritic generation and the radii of gyration necessary for the understanding of the internal stratification of brushes were calculated. Previous self consistent field theory numerical simulations of dendritic brushes of first generation suggested that at high grafting densities two kind of populations are evident, one of short dendrons having weakly extended spacers and another with tall dendrons having strongly stretched spacers. The present Brownian dynamics calculations provided a more complicated picture of dendritic brushes, revealing different populations of short, tall and in some cases intermediate type of dendrons, depending on the dendron generation and spacer length. The scaling dependence of the height and the span of the dendritic brush on the grafting density and other parameters were found to be in very good agreement with existing theoretical results for good solvents.